Explain how sexual reproduction increases genetic diversity.?

Answer 1

in sexual reproduction, gametes under go meiosis.
Meiosis: its too complicated and big to explain. but its actually a process by which cells divide. but it only takes place in gametes. at its end one cell would have split into four with half the number of chromosomes in each cell as compared to the parent cell. chroms always exist in pairs. so each cell will have only one chromosome from each of the pairs of ch that the parent cell had. but each ch of each of the daughter cells will be different from the corresponding ch of the parent cell owing to "crossing over".

when two gametes with half the number of ch combine, they give an embryo with the charecteristic no. of ch of the species. because the gametes will mostly be from different individuals(and even if from the same individual, 'coz the gametes are different from the parent cell from which they evolved after meiosis) a new combination of chromosomes from that of the parents would have formed. so, though the individual whic would grow from this embryo may show similarities with its parents, it will not be exactly like them.
this "variation" from the parental charecteristics + mutations are the roots of biodiversity.

to make it clear: in asexual reproduction an individual just regrows itself. two individuals or gametes with different chromosome composition (which means different charecteristics) dont play a role here. so the offspring will be exactly similar to yhe individual.

Answer 2

Imagine it like this. A mother has the chromosomes HJ and the father has LO. The possible combinations that the child could have are HL, HO, JL and JO. This is the diversity. In humans, there are 23 pairs of chromosomes and each of these pairs will have a similar combinations to the example above meaning there are numerous combinations the child can have. There is also "recombination" where during one of the stages of meiosis, paired chromosomes will swap parts of their DNA. This is of course simplified. Also, in terms of genetic diversity, sexual reproduction is compared with asexual diversity. Asexual reproduction is basically forming a clone. This means that the DNA is the same. Even after 10 generations, the only genetic diversity that occurs is if any mutations occur (as they are all clones).

Answer 3

As opposed to cloning, propagation by cutting, or air-layering, which all produce exact genetic replicas of the original plant, sexual reproduction produces an offspring with the chromosomes of two different parents, and therefore a mixture of genetic traits, which results in a greater combination of available genetic traits within a population.

Now, read your biology textbook and do your own homework!!!

Answer 4

during sexual reproduction there is a process called genetic recombination which is like shuffling a deck of cards (only with genomes, you see). without sexual reproduction, progeny will be very much like their parents with possibly a few novel mutations. with sexual reproduction, progeny will still have a few novel mutations but also new combinations of mutations that occured in previous generations. this represents an increase in genetic diversity in the population as a whole.

Answer 5

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